The article discusses how international law is becoming more important in our daily lives due to globalization. It looks at the debate on integrating customary international law into U.S. law. Customary international law is based on how countries act and their sense of legal obligation. It covers areas like territory, human rights, and the use of force. Some principles, like slavery and torture prohibitions, are widely accepted as binding laws. However, there are controversial principles that some argue have also become customary international law.